Notice that we have only set the length of the crease in numerics to be approximately the same as the crease length in experiments; our continuous description of the crease geometry through the specification of \(\kappa _{20}\)  does not necessarily match with the local crease profile in experiments, which could depend on the material and the creasing method. In Supplementary Material , we show that with sharp creases, which are typical for creased thin sheets, the effects of the local crease geometry on the numerical results are negligible.
After nondimensionalization, the only material parameter is the Poisson's ratio \(\nu \) , which we set to 0.33 for the current study. Details of the anisotropic rod model and its implementation with numerical continuation package AUTO 07P [1]} are included in Supplementary Material .
